Automatic vacuum cleaner



| P. BORKOSKI AUTOMATIC VACUUM CLEANER.

Oct. 6, 1953 6 Sheets-Sheet 1 Filed May 4, 1951 INVENTOR. LEON P BORKOSKI 1 M20 ATTORNE.

Oct. 6, 1953 L. P. BORKOSKI 2,654,439

AUTOMATIC VACUUM CLEANER Filed May 4, 1951 I 6 Sheets-Sheet 2 INVENTOR. LEON R BORKOSKI "ii- 2 M AT T ORNE).

Oct; .6, 1953 L. P. BORKOSKI AUTOMATIC VACUUM CLEANER Filed May 4, 1951 6 Sheets-Sheet 3 INVENTOR. LEON P BORKOSKI BY 2 ATTORNEY.

Oct. 6, 1953 L. P. BORKOSKI AUTOMATIC VACUUM CLEANER 6 Sheets-Sheet 5 Filed May 4, 1951 INVENTOR. LEON PBORKOSKI BY 7% ATTORNEY Oct. 6, 1953 L. P. BORKOSKI AUTOMATIC VACUUM CLEANER 6 Sheets-Sheet 6 Filed May 4, 1951 YINVENTOR. LEON P BORKOSKI M ATTORNEY Patented Oct. 6, 1953 Leon 1; Bork'oski', Stamford; ..Conn:-, assig-nor to .ElectroluxCorporatiom Nerv -york; .N." 1., a corpora/tionof Delaware m nMw-r 1951, Serial 224 (cross-5 1 v.

.l-fl Glaims.

invention relates to a vacuum or :suctron ype cleanerhaving i-automatiec controls. More particularly, it :embracesan iautom'atieallylcondition'ed' tank type: cleaner ihavingvself-contained control :mechanisms for: removing ;'..accumu lated dirtin packagedform: readied I for immediate di'sposaL with this cleaner the :dirtzentrained the incoming tairssuction stream is .collected iinvza porous disposable bag located Within the-cleaner andwhen the :collected dirtreffects 1a predetermined ehangeiin "the :operating efficiency 0f: the :cleaner; Alfie-latter. automatically.shirtszitself OE and: disposes of tth'eidirt r fiitledjtbagibytzejectingithe latter from the rcleaner;

It is a :major obj eat-of :thisiinvention itO'iIIIQVldB amewxand improved vacuum-cleanerchavinglautomaticfinrean aforrdisposing of dust and dirt by ejecting from the .'cleaner @a rselfesealing porous and .disposable-panerabag filled with .zdnstfand dirt separated ,rrom the suction air stream during normal operation of thecleaner,' utilizing asim apIified' anechamcal release: means rte effect the necessary steps;

it is {a furtheraand important obiefcthereofito provide ia'utomaticazllmv positioned toggle" means for :presetting anreleasing devictr zto operating condition.

Astill further:iobject f sthis zinventionfis to zprovide' a "device which a-VDidS' 'Tth-B :iinconvenienees present [in ithe conventional esuetionrtypeaofwaa Mum --=cleani-ng;-devie'e u'smg-zthei cnstomary {cloth or 'ptaper dustiib-ag which"meriodicallmnecessitates indiscriminate :removal -or ';replacement;in order to maintain a semblan'ce of eeiiicient reparation,

such 'bag-iremoval steps:being;heretoforfe effected manually and with considerable di fli'cultygald sdiscomfiture to theoperator;

Still other and ifurtherobj eats-will 'be'xiisfilo'se'd hereinbelowor will becomeievidentxtorthoseiskilled in rtheartfafter: anca-reful studyz flf zthegfel lowiing :cover Open;fthe'hose'sattached, the sejeetor rplate pnshed zback-lan'd a selieseali-ng paper (inst t'bag prior tozits insertion into thelcleaner;

'FigureA is a vertical .sectionalfiview-takenvon the line 4+4 of "Fig; l; :showing-ktheuejector restraining mechanism :in normal :position;

.liigure :25. :is a: vertical sectional wiew-takemon a: ilinerssimilar to Fig. 4, showing; thetselective positioning f the triggering a mechanism" sand thessrelease of the front assembly;

Fiat-nae is a :vertical :section'al iview'taken on :a -l-inesi-rrnlar to Figm, showingithe'rcoverlopened and in phantom the rfinazl Fseleetiize position cot ithe triggering mechanism; iniiull; the resetting-tot the triggering mechanism to substantially normal operating position jS ShOWH;

Figure 7 -;is :a- :perspeetive" View :ofthe v :ba'g ejector mechanism of Eigl 2 invfullyi retracted position; :taken zjfrom" the 'vrearzzafter remoiral of the unit from $he==c1eanerthonsing2 Eigureii is astop. aplan view-taken on cthe flit-1e 818 of Fig; Q'Z'ShOWlIIEQifl-IB electrically-and pneumaticallyaoperated mechanism; and f Figureflwis 1a'-=wiring diaaramcinoludi-ngirsome of :the pneumatic aontrols; V gilt-ism feature-10f *this invention that athe dune ztioningipfrthezcleaneriinitsidust-zdisposalcapacity .issautmnatic; self-eomained and after heing ozrce initiated iby thewestablishmentlof predetermined -changes ithenoperational r-charaeteristies of tlie air suctionstream the zoleaner; the-termite sequence of ..-.operations wterminating in sth'e rejection' aofrthe: dust filled-zbagcis' t-efie'cted in :a series of steps. Thus, with continued dust 'coflection during rthemregular operation: of the: cleaner, a pressure .diif.erenee=; is gradually built' up' within ither-;vclean'er vfloetwreen the inside-:and theout'si'de mfrthe-idust c011ecting=ibag; -This results-ma oonxtinuous andprogressively increasing force being iexertedii-rpon =a pressui'e difierentialmeasuring diaphrag th'e opposite sides of which arepukijectedato th di:fferent-pressures built' up on the outside and ins'ide of the dust bag, -the=chamher won one -side or "the diaphragm 'b eiilg connected do an 'opening communicating with-theclean :side "of the dust bag; the chamber on the other :side' of the diaphragm being-connected to an npeningscommun'icating' with the may side of the dust ba T pon-the attainment or a :predetermined va lueinthe resultant force exerted vup on :the pressLireCdifirential-=divphragm=motion vis impartedto tlnsidiaphragm and atapredetermined distortion rtheqrliaphragmeconditionsmeans which sets into operation a:aserieseorasequencezof fsteps electriealbmaetuated;ipneumatieaily =aetu;

3 ated, mechanically actuated, etc.,) which sequence when once initiated culminates finally in the ejection of the dust-filled bag from the cleaner housing.

In a preferred embodiment, the diiferential pressure diaphragm actuates a switch which closes a circuit for energizing an electromagnetically actuated armature or solenoidal unit. The armature or plunger of the electromagnetic device in turn opens a valve for admitting suction from the motor fan unit to actuate a second diaphragm which, operating through a series of linkages, (1) selectively positions a member which thereafter is in condition for subsequent operation and release of its associated ejector restraining latch; and (2) in timed relation therewith this second diaphragm substantially simultaneously, or shortly thereafter, releases a dust conveying inlet conduit'from operative communication with its dust receptacle. Then, the conduit after a predetermined angular travel towards its fully released position in turn breaks a circuit cutting oh the power supply to the motor fan unit. Continued travel of the conduit towards fully opened position then actuates mechanical means which moves the previously selectively positioned member the additional amount necessary to release the ejector restraining latch for actually releasing the bag ejector mechanism for dust bag ejection, whereupon the dust-filled bag is expelled from the cleaner housing and deposited upon the floor. During the dust conduit releasing steps, the timely breaking of the motor fan circuit results in a progressive deceleration of the motor speed and consequently the air suction stream alsoprogressively decreases to a value at which highly effective bag ejection is more. readily attained.

Thus .in accordance with this preferred embodiment of the invention, automatic dust bag ejection is effected by mechanical means, after being initiated by a tripping mechanism including a pressure difierential measuring device which actuates'a responsive triggering apparatus. The pressure differential measuring device is conditioned for operation by apparatus utilizing the 'air pressure difference built up within the cleaner .casing by dust layers collected in the dust bag. The pressure difference is established between the'inside andoutside of the duct collecting bag, increases progressively with continuing dust collection, and is communicated therefrom by appropriate conduit means throughout the dust collecting process.

, Referring now more particularly to the drawings, vacuum cleaner housing Iii, Fig. l, is va hollow casing having a handle i i. It is appropriately supported on a pair of runners 12. 'The suction -or inlet portion of. the casing I9 is provided with an inlet nozzle [3a and wand i3b together. with a suitable flexible hose l3, and connecting coupling' M fitted into a movable hose coupling assembly l5 which is anteriorly mounted by parallellinkage including front end assembly l6. Front assembly [6, Figs. 2, 3 is hinged at I? to front body ring 29.2116. biased to open position by spring 58; assembly ifi'effects with casing Is an air tight seal formed'by rubber sealing ring member l9, cardboard disc 3!, Fig. 3, of dust bag 30 and sealing ring-22 positioned in the bag insertion opening, of front body ring 25. Tubular member 2! of the hose coupling assembly J5 extends through the opening 32, Fig. 3, cut in cardboard. disc 3! well into the dust collecting receptacle' iifl, and is sealed against disc 3! by rubber sealing ring I9. Switch button 19a on the upper front surface of cleaner housing It! provides the on-and-ofi manual control for the cleaner unit.

A perforated inner housing 23 is aflixed at one end to front body ring 26 and is adapted for supporting dust bag 36 (of disposable paper or, if desired, cloth construction). This entire unit (inner housing 23, body ring 20, etc.,) is slidably fitted within the open end of cleaner housing It! and is afiixed thereto by suitable retaining screws 20a. In the embodiment shown, the housing 23,

reinforced by lateral stifiening plates 25 and base rods 25, is substantially rectangular in crosssection and is thus adapted to take a bag of substantially similar but slightly smaller cross-section 39 Figs. 2 and 3.

Dust bag 30, Fig. 3, comprises a dust receptacle of paper or similarly air-pervious, dust-impervious, material 33 affixed at its mouth to the rear surface of a hard paper or cardboard disc 3|, the latter being clamped between rubber sealing ring H) of hose coupling assembly 15 and the open end of front body ring 23 with theaid of sealing ring22. Cardboard disc 3! has a central opening 32 through which tubular member 2! is inserted in order to introduce the air and entrained dust directly into the interior of dust bag 39. 1

The entire inner surface of perforated inner housing or dust bag receiving compartment 23 'is provided with apertures 21, Figs. 2 and 3, .in

order to permit suction air current to pass freely therethrough and into chamber 49. The suction air current then, passes to the rear of the vacuum cleaner housing It containing the motor fan compartment which has a conventional fan and motor unit mounted therein.

The dust bag ejector mechanism 5!, Figs. 2, 3 and 7, for operating the bag ejector plate 52 includes a fiat or leaf spring 53 which can be bowed or folded back on itself, Figs. 3 and 7, into fully flexed (loaded) condition by pushing back the ejector plate 52 into its latching positionj Dust bag ejector plate 52 is hingedly attached by pin 54 to the front end of flat spring 53, Figs. 2 and 7, while the rear or fixed end of fiat spring 53 is hingedly attached by pin 55 torear mounting member 56. Ejector plate 52 is slidably mounted by sleeve 52a on guide rod- 57 which maintains plate 52 oriented correctly throughout its region of travel. The rear wall 6!) of dust bag receiving compartment 23 is affixed to the rear end of perforated inner housing 23 and has a. slot El cut therein to receive a tongue 55a which rigidly supports rear mounting member 53 of the ejector mechanism 5i. Suitable bulkheads are provided within the outer housing I!) to adequately support and align innerhousing member The ejector plate 52 of ejector mechanism5 I, is held in spring loaded position by releasable latching means which engages a depending lug 52b,

7 Figs. 2, 3 and shown more clearly in Fig.7. I Lug 52b is integral'witnejector plate 52 andsleeve 52a and engages spring latchv 62 when plate 52 is pushed back into loadedposition, see Fig. 7.

'Spring latch -62"is aifixed at one end tolatch bar 63, and moves over a limitedrange therewith 52b whereupon ejector mechanism 5I-is released to effect dust bag ejection. *Latch bar 63 is slidgauges 5 ably mounted on guide roo t-ll: at :one' enu' by sleeve 63a, Figs, 3, 4;:5 and 6;ar1d at the ptnerzby aperturedi upwardly bent :endportion- 63b; Figs. 23 3 and -7.

The particular detailsof one embodiment for a restraining mechanism adapted to control the movement oflatc'h bar 63 1s clearly'shownzin Figs. 4, '5 and 6' especially when considered together with Figs. -2 and 3. In' thesefigures llatch bar restraining and releasing pin 10, Fig 4, :biaseddzo latching position by I leaf spring 10b, projects through an opening 8012' cut in base plate-$. Pin 10 is adapted by downward axial movementtobe withdrawn from its latchbar restraining position -'-(Fig. 49 to its latch bar Lrelea'sin'g: position (Fig.6).

The above latches f'or' restraining .ithe ejector mechanism are operated by cooperative association with appropriate selectively positionable triggering? mechanism'.-- Thhsftoggle 90a, fulcrumed :at 9 01) on lever 90 is adapted to be: selectively: moved to pin releasing position -(see-1Fig.

5-) by link 90c, and is hel'd by 'sprinigs one either 'in i'ts normally ineffective position shown in'iFig. 4 or in its selectively positioned pin releasing position, Fig. 5. Th'is selective movement-of toggle 90a is effected by automatic triggering iinitiate'd by pneumatically actuated means (described below and in considerably more detail in patent application serial :No. 140,394, filed'Januany 25,. 1950') and transmitted through link 900 which is actuatedby-arm I 0011 fulcrumed sat I001) and lin'keddirectly to pneumatically operating -triggering device 2 5'11.

Latch bar restraining and releasing. pin: is

moved to releasing position shown in phantom Fig; 6) by*' the 'final movement stages of the withdraw pin 10 and releaselatch bar- 68:

With this particular latching device .for'irestraining' th'e' ejector mechanism 5 l, vplate I 52-=ris held in'loaded -position "-until :assembly l6 and/or assembly 1 5 is practically .fullyrreleased. Assemblylfi isheldclo'sedby latch l00, .Figs. 2, 3,4, .5 and6; latch lllfl is iulcrumedat I01 :and biased to latchingi'position by spring I02.

The cleaner housing [-0 maybe opened Jfor tinspection of the bag and its contents, :however, without necessarily ejecting the dust bag by manually lifting the externally protruding end 1000 of-latch [00,Figs. l, 4 and 5, thereby. re-

leasing the front end assembly I6. Then even though actuating lever arm Sill-is subsequently "moved by the opening-of theirontassembly 1-6 to its full extent,=since toggle 90a will not have 1 been selectively positioned (seev Fig. 4),, .theiorked -endsillid thereof will not actuatelpin 1 0 to latch .bar releasing-position, therefore :;pin=:'|=0 will :still restrain ejector 51 from 'discharging the dust bag. Toggle 90a thus serves as zan'lauxi'liary safety-latch preventing the dust bag in either full 6'1" mpty*cohiiitidh "fi'dm be ihge ected upo'n 'riier'ly" manually opening the i fronti assemlily fli.

' Ontfiebthei" hand, with 'the frorit assembly"Ni "closed; *spring' latchtzcannot be released and 6 serveszasianiauxlliarysafety latchpreventing the release of.' ejector 5 liand' the compression and jamming of I the bag withinthe housing, tsince latch bar 63 must firstzbe -releasedby thewithdrawal ofiirestralning :pin- 10; Thetlatterztnecessitates the selective "positioning of itoggle 9011 by theatriggering. action above described) which .must' :be' previously" effected byv suitable control mechanism, namely *the 1 actuation of the pneumaticallyoperated "device '25 ll;

.It is to -be1noted= that pneumaticallyoperatcd device :01in addition *to triggering toggle 9.0a and -setting the mechanism for the subsequent release of ejector restraining llatch bar-163:;also releasestsubstantially simultaneously, the cover retaining latch I00 b y i'actuatin'g "arm I'Ofla, Figs. 4; Band-8, 'fulcrumedat I Hob but adapted' to tum clockwise'a's 'aunit with latch I00, whereupon the entiredatch'zl 00 isimoved'sas'ia unit-to release amemb'er' lfi-(seephantom view Fig. .5);

The parallel linkage of the hose coupling .assembly 15 :to the Jfront ring 2015 most clearly see in.Figs. 2 and 3. There, .link 1 l5 pivoted-at "'6 to front ring'ZB and at l H to hosecoupling assembly 1| 5 forms one :link .in the-parallel link- .agewvhile cover zlfi'ifulcrumed at l] to =front-rin 2 0 an'd:atil I8 to hose couplingzassembly [Storms theotherlink.

Button Illa onthe upperefront surfaced-housing lll operates a circuit .make and breakswitch vl l?B; Fig. 9"ofithe conventional toggle snap switch .typeithroug'h rocker arm H1 tpivotedat 1112; This buttonfillla is locked in ofi position-when :cover 16 is open by pressure exerted bya'slidingunechanism H3 'biasedto the left, Fig. 9, byspringd. Thus, although button 10a may be "used to. start and stop the motorifa-n unitwhile thecover- 16 remains closed, .the opening-of cover 16 with :the circuit closed releases-slide H3 and causes incline'd surface 96, .Fig. 9, to actuate a lug .95 on switch buttonl oaland move rockerarm H I., .Fig. :9, counter-clockwise thereby opening the toggle switchcircuihstopping the motor .fan unit and otherwise-deenergizing the unit The electrical .and' .pneumatic :control units .aresoperatively interrelated. The pneumaticsystem comprises apress-ure-:differential measuring control device?200,xFigs.- 8 :and :9, having aelower casingiwl Figs; 4 and '5, and an upper easing- 202 separated by "a "diaphragm; The space :in the lower casing below the diaphragm is connected by communicating conduit d ke-Figs. 4, etc;, to "opening '-2 l 51mg. 2,-1on the dirty ordust .-co1leoting side ofthedust bag; while the'space in the -upper i. casmgiasbove the diaphragm ie-connected. lay-communicating conduit 2Z2 8',- Figs; :8, 9 'T-shaped cou- 'pling 'xzzl-and.commonconduit 225 to opening 230, Figs. 4, 5, and especially 8,- on thezcleanzside ofthe: dust ba'g; The remaining-connection from the T-shalped coupling communicates by .means of oondu-it 2 3'1;Fig 8, withone sidemfzvalve x2420 comprising valve stem 25'! biased inormally'to closed I position by a spring. 'XVhenWalve 1 Z2 40 :is "open' it communicates high I suction tov the interior of pneumatically opera-ting: triggering device "250, comprising alower casing Z- BI, Fig. 4, sealed by-diaphragm 2 52, Fig.8;- biased to d-istended orupwardposition by a spring and- 0apa'ble *of actuating trippingmechanism-through "member '254.

The electrical system 'ior-energizing'the motor fan unit'andth'e electrical controls-is 'clearly shown-indiagrammatio form in FigiQ Vacuum cleaner electrical cord 3-00 convey-s currentflcm the-house linesat ll0 volts' to terminal-strips 3M within the cleaner housing from which one line 302 goes to motor 303, the other line goes to motor 303 through a circuit including line 305 on-and-ofi switch 3H1, line 3| 1 and line 313. The circuit for energizing the electrical controls comprises line 320, electromagnet 32 5, line 2326, switch 321 of pressure differential pneumatic control unit 200, and line 328 to the house circuit through the cleaner cord 300. The switch 321 of pressure differential pneumatic control unit 200 includes a biasing spring which may also serve as a conducting element and for maintaining the switch normally open between the switch terminals.

In detail and particularly with respect to the operation of the pneumatic and electrical controls and referring especially to Fig. 9 where de tails of structure are illustrated the force exerted on the pressure differential membrane of switch 200 progressively increases with continued dust collection, until it attains sufficient value to actuate switching means 321 and complete a circuit by closing contacts therein and thereby energize electromagnet 325. The armature 35B of electromagnet 325 fulcrumed at 35! and biased by spring 352 to hold valve 240 closed, then opens valve 2 39 allowing high suction to operate diaphragm 252 which in turn through a series of linkages 254, [8811, 900, etc., selectively positions toggle 90a so that the latter can subsequently by additionally imparted movement release latch pin 10, Figs. 4, 5, 6 and 8, which restrains latch bar 53 holding ejection plate 52 and also through lever iflta, Figs. 4, 5, 6 and 8, substantially simultaneously, trips cover releasing latch H10, Figs. and 8 which .holds comprising lever 99 withdraws latch pin 10 "(see phantom view Fig. 6) releasing the bag ejector mechanism 5| through a previously traced series of steps, allowing the bag ejector plate 52, Figs. 2, 3 to push the bag forward and throw the bag and its contained dirt out of the cleaner casing.

The ejector plate 52 moves forward and out ward when released until arrested by the extended length of flat spring 53, Fig. 2. The momentum of the moving dust-filled bag causes it to continue onward in its own trajectory out of the cleaner casing after which it comes to rest on the floor.

It is to be'noted, that in order to effect the release of ejector plate 52 by the slipping of spring latch 62 under the bottom edge of depending lug 52b, a short forward travel of latch bar 63 is necessary. This motion is a result of pressure exerted by leaf or flat spring 53 following the withdrawal of pin H3 (see phantom view, Fig, 6) and the accompanying release of the forward end 630 of the latch bar 63. During this short forward travel, the inclined portion 63d of latch bar 63 actuates pin 78 from above to undergo still further downward travel and .causes the upper spool end a. of pin ii) to throw toggle 99a back into its normal position (full view, Fig. 6); see also Fig. 3 where the repositioning of toggle 96a is completed. 7

The. reloading or repositioning of ejector mechanism 5| so as to ready the cleaner for'the insertion of a clean bag (see Fig. 3) is effected by pushing ejector plate 52 manually all the way back into the cleaner housing until lug 52b passes over and beyond the restraining edge of spring latch 62; then, by continuing the backward travel of ejector plate 52, depending lug 52b strikes upwardly extending portion 63b of latch bar 63 and the entire latch bar 63 is moved suniciently far back so as to allow pin l0 (biased upwardly by pin spring 70b) to ride up the inclined surface 63d until the forward end 630 of latch bar 63 is securely held against pin 10 (see Fig. 3).

It is to be understood that the specific embodiment herein described in considerable detail is merely an illustrative embodiment of the invention which is to be limited in scope solely by the appended claims.

What I claim is:

1. In a vacuum cleaner, a housing enclosing a dust receptacle compartment, an opening in said compartment, a dust receptacle insertable into said compartment through said opening and being formed with an inlet aperture, an inlet conduit for communicating with said aperture, releasable means for movably securing said conduit to said housing, means for ejecting said dust bag, restraining means for preventing operation of said bag ejecting means, a selectively movable member settable to a position conditioning it for releasing said restraining means upon subsequent additional movement of said member, means responsive to the establishment of a predetermined pressure difference between the inside and outside of said bag for setting said selectively operable member to said abovementioned position, means responsive substantially simultaneously with the setting of said selectively operable member for releasing said conduit securing means, and further means responsive to the further movement of said conduit for effecting the additional movement of said selectively operable member to release said restraining means.

2. In a vacuum cleaner, a housing enclosing a dust receptacle compartment, an opening in said compartment, a dust receptacle insertable into said compartment through said opening and being formed with an inlet aperture, an inlet conduit for communicating with said aperture, releasable means formovably securing said conduit to said housing, means for ejecting said dust bag, restraining means for'preventing operation of said bag ejecting means, a selectively movable membernormally inoperative to release said restraining means and settable to a position conditioning it for releasing said restraining means upon subsequent additional movement of said member, means responsive to the establishment of a predetermined pressure difference between 'theinside and outside of said dust bag for setting said selectively operable member to said above-mentioned" releasing position, 'means responsive substantially simultaneously with the setting of said selectively operable member for releasing said conduit securing means, and further means responsive to the further movement of said conduit for ellecting theadditionalmovement of said selectively operable member to release said restraining means; 4 a

3. In avacuum cleaner, a housing enclosing a dust receptacle compartment, an openingin said compartment,.a dust receptacle insertableinto said compartment through said openingand be-' ing formedwith an inlet aperture, aninlet conduit for communicating-withsaid aperture,--releasable means for movably securing said conduit to said housing, means for ejecting said dust bag, restraining means for preventing operation of said bag ejecting means, a member selectively settable to a first position conditioning said memher for releasing said restraining means upon subsequent additionalmovement of said member and settable to a second position to render it ineffective for said releasing operation upon said additional movement, means responsive tothe establishment of a predeterminedpressure diflerence between the inside and-outside of said dust bag for setting said selectively operable member to said above-mentioned first position, means responsive substantially simultaneously with the setting -.of .said selectively operable: member, for releasing said conduit securing means,.and further means responsive to'further movement of said conduit for effectingthe additional movement of said selectively operablemember to release said restraining means.

4. In a vacuum cleaner, a housing enclosing a dust receptacle compartment, an opening in said compartment, a dust receptacle insertable into said compartment through said opening and being formed with an inlet aperture, an inlet conduit for communicating with said aperture, releasable means for movably securing said conduit to said housing, means for ejecting said dust bag, restraining means for preventing operation of said bag ejecting means, a slidable restraining bar having a latch at one end and at the other end an inclined surface terminating in an abutment arrested by said restraining means, release of said abutment by said restraining means causing said inclined surface to subject the restraining means to still further movement, a selectively movable member settable to a position conditioning it for releasing said restraining means upon subsequent additional movement of said member, means responsive to the establishment of a predetermined pressure diflerence between the inside and outside of said dust bag for setting said selectively operable member to said above-mentioned position, means responsive substantially simultaneously with the setting of said electively operable member for releasing said conduit securing means, further means responsive to the further movement of said conduit for effecting the additional movement of said selectively operable member to release said restraining means, and additional means responsive to said still further movement of said restraining means for setting said selectively positionable member to a position incapable of effecting the release of said restraining means.

5. In a vacuum cleaner, a housing enclosing a dust receptacle compartment, an opening in said compartment, a dust receptacle insertable into said compartment through said opening and being formed with an inlet aperture, an inlet conduit for communicating with said aperture, releasable means for movably securing said conduit to said housing, means for ejecting said dust bag, restraining means for preventing operation of said bag ejecting means, a movable restraining bar having a latch at one end and at the other end an inclined surface terminating in an abutment arrested by said restraining means, release of said abutment by movement of said restraining means causing said inclined surface to subject the restraining means to still further movement, a selectively movable toggle member settable to a position conditioning it for releasing said restraining means upon subsequent additional movement of said member, pneumatic means responsive to the establishment of a predetermined pressure difference between the inside andoutside of said dust bag for setting said electively operable toggle member to said above-mentioned position, means responsive substantialiy simultaneously with the setting of said selectively operable toggle member for releasing said conduit securing means, further means responsive to the further movement of said conduit for effecting the additional movement of said selectively operable toggle member to release saidrestraining means, and additional means responsiv to said still further movement of said restrainingmeans for settingsaidselectively positionable toggle member lto a position incapable of effecting the release of said restraining means.

6: In a vacuum cleaner having a housing enclosing a dust receptacle compartment, an open ing in said compartment, and a dust receptacle insertable into said compartment and ejectable from said compartment through said opening, the combination therewith comprising a member for ejecting said dust bag, a guide rod, means on said ejecting member slidable on said rod, a latching means releasably restraining said member from movement along said rod, means for moving said latching means, and means engaging said latching means and eifective upon movement of the latter to release said latching means from said member to free the latter for movement along said rod.

'7. In a vacuum cleaner having a housing enclosing a dust receptacle compartment, an opening in said compartment, and a dust receptacle insertable into said compartment and ejectable from said compartment through said opening, the combination therewith comprising a cover for said opening, a member for ejecting said dust receptacle, a guide rod, means on said ejecting member slidable on said rod, a latch bar having at one end coupling means releasably coupling said member from movement along said rod and at the other end latching means for restraining said bar in one position, means for moving said latch bar, means for uncoupling said coupling means upon movement of said latch bar, and means actuated by said cover and engaging said latching means and effective upon opening of said cover to release said latching means from said latch bar whereby movement of said latch bar frees said member for movement along said rod.

8. In a vacuum cleaner having a housing enclosing a dust receptacle compartment, an opening in said compartment, and a dust receptacle insertable into said compartment and ejectable from said compartment through said opening, the combination therewith comprising a movable member for ejecting said dust receptacle and a fiat leaf spring having a fixed end attached to said housing and a movable end attached to said member for moving the latter upon expansion of said spring, the extent of travel of said movable member being determined by the length of said flat spring.

9. In a vacuum cleaner having a housing enclosing a dust receptacle compartment, an opening in said compartment, and a dust receptacle insertable into said compartment and ejectable from said compartment through said opening, the combination therewith comprising a cover for said opening, a member for ejecting said dust receptacle, means for restraining said member from 11 operation, a flat leaf spring having a fixed end attached to said housing and a movable end attached to said member for moving the latter upon expansion of said spring, and means actuated by said cover and engaging said restraining means and effective upon opening of said cover to release said restraining means, the extent of travel of said member being determined by the length of said flat spring.

10. In a vacuum cleaner, a housing enclosing a dust receptacle compartment, an opening in said compartment, a dust receptacle insertable into said compartment through said opening and being formed with an inlet aperture, an inlet conduit for communicating with said aperture releasable means for movably securing said conduit to said housing, means for ejecting said dust bag, restraining means for preventing operation of said bag ejecting means, a selectively movable toggle member settable to a position conditioning it for releasing said restraining means upon subsequent additional movement of said toggle member, pneumatic means responsive to the establishment of a predetermined pressure difference between the inside and outside of said dust bag for setting said selectively operable toggle member to said above-mentioned position, means responsive substantially simultaneously with the setting of said selectively operable toggle member for releasing said conduit securing means, and further means responsive to the substantial movement of said conduit for effecting the additional movement of said selectively operable toggle member to release said restraining means.

LEON P. BORKOSKI.

Name Date Number Cranmer Aug. 14, 1951 

